Cooking-oven.



PATENTED' OCT. 23, 1906.

I. MCGUIRE. COOKING OVEN.

APPLICATION FILED MAR. 27,1906.

cm, WASHINGTON, n, c.

' ,To all zohorrt it may concern: v

Be it known that I, JOHN MoGUIRE, a sub- 82 William street, Melbourne,

JOHN MoGUIRE, or

PATENT. OFFICE I M n oURNE, VICTORIA, AUSTRALIA.

' COOKING-OVEN.

j ect of the King of Great Britain, residing at in the State of Victoria, Australia, haveinvented certain new and useful Improvements in Cooking,

Ovens; and I do declare, the following'to be a full, clear, and exact description of the im? tion, such as will enable others skilled in the art 'to which it appertains to make and'use the same. I

This invention has been de vised to provide facilities for observing the cooking operations in ovenssuch as ranges, gas-stoves, bakers ovens, and similar structures wherein at present it is not possible to note the cooking process at work when the doors are closed.

My invention also provides a thermometric indicator for the assistance of the cook or baker to enable such operator to judge whether the oven is properly heated before committing wit the food or similar material to be cooked and also to permit the cook or bakerto note during the cooking or'baking process whether the heat is being properly maintained-or is not excessive for the satisfactory preparation of the article under treatment.

In order that my invention may be the more easilyunderstood, reference may be made to the accompanying drawings, in

ter and lugs for securing it to the frame in Figs. 1 and 3.

Into the door a of the oven or analogous structure is cut an aperture a. Around the edge of this aperture (preferably the outer one) I place a rim-plate b, and in this plate I. place a closely-fitting sheet of glass 0, ofpreferably about three-sixteenths of an inch in thickness and -making a special provision that at the top and bottom and at thetwo sides a small space at (1 shall be left to allow for the expansion of the glass 0 in its length and width. The cavity at d thus allowed around the edge of the glass 0 is filled in with Specific'ati on of Letters ratent. Apphcation meander 1906. Serial Na. 308,261.

Patented Oct. 23, 1906'.

,a fillet'e of pulpy asbestos cloth or the like incombustible fibrous or compressible material." The outer'or rim plate bis screwed to the metal of the oven-door a by screw-pinsf. Directly behind a portion of the sheet of glass c and preferably at one side I place a highdegreethermometer g, its tabulated column being hermetically secured to the glass plate a, so that steam, smoke, orsplashings may not getbetween the said glass plate and the indicator-numbers of the thermometer g ;I provide plates g, having therein perforations, as g through which (in the case of rectangular form in Fig. 1) rivets or screws may pass to secure such lugs to the door-plate a, or in case of the circular form in Fig. 3 the screw- 'the latter with terminating lugbolts f at top and bottom may pass through said lugs to hold the thermometer, as shown. The thermometer g may have placed upon its face certain indicator-words to inform the cook of the most suitable heights of temperature for the various kinds of food to be cooked or baked. Alternatively a tabulated card may be kept in the kitchen or like place and upon which the most suitable relative degrees of heat to the particular foods could be simply and correctly shown, so that should the cook desire to roast a piece of beef a perusal of the card will show to what degree the oven should be heated.

Where it is more desirable or some special reason may exist for not placing the glass plate a and thermometer g in the door a of the oven, I may place the same in the side or back of that part of the oven wherein the cooking or baking is to take place.

In operation the cook or baker will see by a glance at the thermometerg whether the Meats, pies, scones, bread, puddings, and

the like food can thus be cooked to the exact extent and to the proper appearance on surface as ma be required in ideal cookery.

I would have it understood that glass having special heat-resisting properties is desirable for use in my invention and that where obtainable and economical I might in some cases employ sheet talc or mica in lieu thereof.

I would have it understood and it is obvious that where my invention is to be part of a new oven-door I may, in lieu of laying the parts I) and 0 onto the surface of the out side of the door a, cast or construct the latter so as to have an internal recess for the reception of the glass plate 0 and its fillets e and in Which case the rim-plate Z) may be either inside or outside the door a in keeping with the position of such internal recess.

It is important that the fillet e should be of such a material that while it is incombustible it will be sufficiently elastic and compressible as to keep the cavity at d well filled around the edge of the glass 0 and prevent heat from escaping thereat and. at the same time will allow of the expansion and contraction of the glass, owing to its changes of temperature. At night-time a small lamp or other light can be placed at a short distance away in front of the glass 0, so that its light will be thrown into the oven when required.

What I claim as my invention, and desire to secure by Letters Patent, is

In cooking ovens: in combination, an oven-door having an aperture cut therein a sheet of glass covering such aperture and enabling articles in the interior of the oven to be seen through same a fillet of non-combustible compressible material surrounding the edges of such glass a graduated thermometer placed behind such glass and exposed to the heat of the oven said thermometer" having its graduated face hermetically secured to the sheet of glass a rim-plate to keep the glass and thermometer in position and means for securing the whole of the parts together substantially as and for the purposes set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JOHN MCGUIRE.

Witnesses:

A. HARKER, A. T. MADDEN. 

